Again I stated "Don't bring more than a three TH range, don't bring anything under th8, don't bring lopsided bases yourself (long term .5s, defenseless, etc)" and you'll rarely see engineered opponents. You said you already do these things, but it sounds like you don't. The MM doesn't care how long your 10.5 has been warring, it cares if you get lopsided by dropping heavy offense without heavy defense. It doesn't care how recently your other 10.5 joined up, it cares if its lopsided.
I'm not judging or making a moral case against your clan, not saying you deserve a horrible match. I consider engineering fair game. But there's a strong correlation since October between 1. bringing lopsided accounts to war and 2. getting wild matchups, including versus clans that engineer a lot harder than you.
There's also a strong correlation between bringing th7s and ending up with engineered opponents. I think these are the key takeaways from the epic thread on the issue -
https://forum.supercell.com/showthre...mpetitive-wars